Autotrophs: Autotrophic Mode of Nutrition, Heterotrophs: Heterotrophic Mode of Nutrition, We see patches of slimy, green layer floating on the surface of a pond or lake, or even in the. (d) Lactose. Developed by Chantier 7 project team members Instructional goals: Students will be able to: 1. The methods of obtaining food are called modes of nutrition. The carbon dioxide gas present in air enters the leaves of a plant through the stomatal pores present on their surface and utilised in photosynthesis. Q2. There is partial breakdown of glucose into ethyl alohol, carbon-di-oxide and, Food is broken down form here to release energy. The book is divided into several sections. These multiple choice questions on Photosynthesis are very useful for SSC, UGC NET, NEET etc. By practising these questions, students will revise all the important topics of this chapter. Question 14 Explain how , water and minerals are transported to the leaves of a plant to be used in food making by photosynthesis? Question 9 Why animals are called as heterotrophs? (iii) The free oxygen in the atmospheric air is the result of photosynthesis. Which four of the following are needed for photosyn-thesis in a leaf: Question 10 What is the role of the Ozone layer in our atmosphere? Question 9 Why is it always advised not to play with fireworks? In order to carry out photosynthesis, what are the substances that a plant must take in ? Question 15 What is the role of sunlight in photosynthesis? Photosynthesis, Nutrition in Plants, Class 7 - The process by which green plants make their own food from carbon dioxide and water by using sunlight energy is called photosynthesis. (i) Carbon dioxide: from air The. Carbon dioxide and water. The green colour of algae is due to the presence of chlorophyll in them. Go To Download Page Close. Last Updated on March 20, 2019 By Mrs Shilpi Nagpal. Plants often turn some of the food they make into another substance for storage. (i) Carbon dioxide The presence of carbon dioxide, water, chlorophyll and sunlight is necessary for the process of photosynthesis to take place. (iii) Nitrates : Column A          Column B, State whether the following statements are True or False: This green layer is formed by the growth of tiny green plant-like organisms called algae . (a) Vitamins Plants combine some of the glucose carbohydrate made during photosynthesis with nitrate minerals(obtained from soil) to make amino acids which are then made into proteins.In this way, plants make proteins as food. Oxygen Carbon dioxide Hydrogen 2. How do plants get energy? The simplest food synthesised by the plants by photosynthesis is, a simple carbohydrate called glucose. In the absence of photosynthesis, there would be no oxygen in air and hence no animals could exist on this earth. Photosynthesis is important for the existence of life on this earth. If so, what is its source ? All the non green plants and animals (including human beings) are heterotrophs. Which gas is taken in and which one is given out by the leaf in bright sunlight ? In this article, you will get access to extra questions from Class 7 Science chapters like heat, motion and time, winds, weather and respiration in organisms, These questions are based on NCERT Science Exam question papers of Class 7. Ans. Chlorophyll is a green pigment found in the chloroplasts of the plant cell … Question 11 Define (1) galvanization (2) Crystallization process. Q3. All the questions are taken from NCERT Books for Class 7 Science only. The process by which green plants make their own food (like glucose) from carbon dioxide and water by using sunlight energy (in the presence of chlorophyll) is called photosynthesis. Describe the phenomena of transpiration, photosynthesis and cellular respiration 2. Ans. Question 8 “Human being cannot make their own food”?Explain? Photosynthesis is usually represented by the equation 6 CO2 + 6 H2O + light --> C6H12O6 + 6 O2. The plants also obtain nitrogen from the nitrogen fertilisers. Even the plants use the same oxygen in dark for their own respiration. The glucose carbohydrate is made up of three elements : carbon, hydrogen and oxygen. (2)The glucose carbohydrate then gets converted into a complex carbohydrate called Starch. Carbohydrate which is produced in the process of photosynthesis is ultimately converted into starch and stored in leaves. The plants use the simple carbohydrate glucose to make many other foods such as starch, oils (or fats), proteins and vitamins. Play this game to review Photosynthesis. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The oxygen gas produced in the leaves during photosynthesis goes out into air through the same stomatal pores. The opening and closing of stomatal pores in the leaves is controlled by the guard cells.  True (2) How the plants obtain water for photosynthesis – Water present in the soil is absorbed by the roots of a plant and then transported to the leaves through the vessels which run like inter-connected pipes throughout the roots, stem, branches and leaves. In the absence of photosynthesis, there would be no plants on this earth and hence no animals will survive. Also mention their sources. Choose the correct answer: Question 1. Most of the plants have green coloured leaves. Other parts of a plant usually cannot synthesise food because they do not contain chlorophyll. What photosynthesis accomplishes, why it's important, and how the light-dependent and light-independent reactions work together. Which gas is needed for photosynthesis? Multiple Choice Questions This quiz will test your knowledge about how plants and other organisms undergo the process of photosynthesis. Light Heat Electrical 3. The Questions and Answers of What is the equation of photosynthesis.? Question 7 Differentiate between physical and chemical change with 2 examples of each. (iv) Water: from soil 1 Photorespiration, usually occurs in A One cell organelle. stagnant parts of a river . Some of the simple carbohydrate glucose made by the plants through photosynthesis is converted naturally into a complex carbohydrate called starch. (c) Cellulose (1)Photosynthesis by plants provides food to animals (including human beings): The survival of animals (including human beings) depends on the food made by plants by photosynthesis. Also explore over 75 similar quizzes in this category. Oxygen gas is produced during photosynthesis which is utilised by all the living organisms for their survival. Chlorophyll is present in every leaf of a plant in the form of hundreds of tiny structures called chloroplasts. Name the following: (i) A parasitic plant with yellow, slender and tubular stem. Answer: 30 seconds . Chlorophyll can absorb the energy from sunlight.  What happens to the energy liberated during respiration? Any activity inside the cell is carried out by the energy released by these ATP molecules. The non green plants called fungi are heterotrophs. Chloroplast: Photosynthetic apparatus. (ii) Oxygen, Suppose we compare the leaf with a factory, match the items in Column A with those in Column B. (iv) Water: Do plants need oxygen ? What type of energy is needed for photosynthesis to happen? All the MCQs are selected form the Class 7 Science NCERT Book Chapter 1 only including all the important topics, main questions, keywords based questions and short questions from exercise. a) Grana. 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